11112222022021 has 4 divisors (see below), whose sum is σ = 11162052614272. Its totient is φ = 11062391429772.

The previous prime is 11112222022007. The next prime is 11112222022037. The reversal of 11112222022021 is 12022022221111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11112222022021 - 2³⁷ = 10974783068549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112222022021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112222022921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24915295791 + ... + 24915296236.

It is an arithmetic number, because the mean of its divisors is an integer number (2790513153568).

Almost surely, 2^{11112222022021} is an apocalyptic number.

It is an amenable number.

11112222022021 is a deficient number, since it is larger than the sum of its proper divisors (49830592251).

11112222022021 is an equidigital number, since it uses as much as digits as its factorization.

11112222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49830592250.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11112222022021 its reverse (12022022221111), we get a palindrome (23134244243132).

The spelling of 11112222022021 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, twenty-two thousand, twenty-one".